The Bioworld Dr. Seuss Grinch Grinchmas Naughty or Nice 18oz Oval Ceramic Mug is a stylish and festive addition to your holiday celebrations. Featuring a solid green color with the iconic character of The Grinch, this round ceramic mug is themed around Christmas. With a capacity of 18 fl oz, this modern coffee mug is decorated and dishwasher/microwave safe for convenient use. Perfect for enjoying a warm beverage while showing off your love for Dr. Seuss and the classic Christmas story.